Peter Dillon wrote:

> I have seen AFB infected brood in very limited numbers - and it was impossible to state whether it
> was EFB or AFB - the cells were open.
snip
> AFB may show symptoms that may be seen/ associated with EFB, as well not presenting "classic
> symptoms".
> Hence my position that it is practically impossible to make a definite diagnosis of AFB in the
> field.
> The chances of correctly diagnosing EFB in the field is much better by comparison.

Peter's response is the kind that makes the BeeList worthwhile.
Exceptional and educational.

I was taking with an expert and he made the same observations as Peter.
When inspecting a yard he found EFB but knew that the yard had
experienced AFB in the past. AFB was not obviously present. EFB was.
Beltsville had to determine what was actually present and did find that
the EFB was "masking" the AFB.

Bill Truesdell
Bath, Maine

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